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Advisory record · GHSA-5m9f-rphj-c435

RabbitMQ Java client: TrustEverythingTrustManager used by default in useSslProtocol() enables MITM

CVSS 5.1 MediumEPSS 0.0031 · 23rd percentile

Published by the GitHub Advisory Database at 18 Aug 2026, 16:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
com.rabbitmq:amqp-clientMaven<5.33.05.33.0
Identifiers
GHSA-5m9f-rphj-c435 · CVE-2026-63336
Weakness (CWE)
CWE-295
Tags
Published
18 Aug 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Affected versions of the RabbitMQ Java client (com.rabbitmq:amqp-client) before 5.33.0 use a trust manager that accepts any TLS certificate when ConnectionFactory.useSslProtocol() is called without arguments, and hostname verification is off by default. A network attacker positioned between client and broker could intercept traffic and read credentials. Upgrade to amqp-client 5.33.0 or later; until then, call useSslProtocol() with an explicit trust manager and enable hostname verification.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.1 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0031, the 23rd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.